Board drop-hammer.



H. TERHUNE.

'BOARD DROP. HAMMER,

APPLICATION FILED JUNE 26, 19-16. 1,246,182. Patented Nov. 13, 1917.

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-1,-24 6 ',182.v l Patented Nov. 13,1917. T

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7 To cohom may concern:

Be it known that I, l-lownnn'liiiirionn, a citizen of the United statesganda resident of Chambersburg, in the county of Franklinand -State of.- Pennsylvania, have ed certain new and useful l'mprdvements' BOaId Drop-Hammers, of which the 1 lowing is a specification.

My invention relates to improvements in board drop hammersand more particularly to improvements in -means for carrying the clamps which engage and holdthe board which carries. the ram after the latter has been lifted to its raised position, the object of my invention being to furnish certain improvements in. the floating head type. of hammer which will prevent the flying of parts-and the possible'injury ofthe operator in case. of breakage ofsaid head.-

In the accompanying drawings forming part of this specification and in which similar letters of reference indicate similar parts.

throughout the several'views:

- Figure 1,is a side elevation, partly sec tion, of the upper endof a board drop hammer embodying my invention:

Fig. 2, a plan of the board clamp plate, the clamps, and the arms by means of'which the shafts carrying the clamps are operated:

Fig. 3, a plan of board clamp plate Fig. 4, a-section of Fig. 3 on line A-A:

Fig. 5, a side elevationof a board clamp:

Fig. 6, a side elevation of eccentric shaft upon which boardclamps are carried Fig. 7 an end elevation of Fig. 6:

Fig. 8, a plan of head piece, bolted to top of the side frames of the hammer. which carries the plate carrying the board clamps, the elevating rolls, etc.':

Fig. 9, a side elevation of Fig. 8.

'To'the top of the sideframes 2 of the hammer is bolted the head piece 3 the botwhich area loose fit insaid perforations so that said headimay have some play.v

" In the 'sides'of thefloating head 12 are journaled the eccentric shafts 4, Figs. 6'

and 7 which carry the board clamps 10-1'1 and which, themselves, carry the' crank .noaan nnor-iianivina.

* Specification. of Letter s may fiemmsrvaw @W WANIAQA QQR BA:

a well-known: manner a bring the -board awed Na a i imation filed June 26, se min 105,833? 1 I clamps 10 11 into or out 'of operative fgon the drawings the floating plate with its board clamps is sli'o'wn beneath the? rolls which elevate the board and ram. By proper modifications, which will occurto any mechanic, the floating plate may be placed above the board operating rolls. Likewise it will be seen that the positions of thelugs 1a and of the slots 6 may be re versed, that-is that the lug may be carried i y the fi tihg plate 12 and the slots be formed in the stationary head piece 8;

' All the strains due to the movements ofv the board clamps are transferred to the floating plate and asthis plate is weakest in the middle it will break at this point if overstrained. In course of time this is very apt to; happen'but if it does'the lug and slot arrangement will p'reventany of the; broken'parts from leaving the machine and doing damage to persons or property inits vicinity.

Another advantage of mounting the board clamps in a floating plate is that this ar rangement permits these clamps to follow the irregularities of the board while they are at all times still under, perfect control of theoperator. I

As this application is confined to the floating plate arrangement for carrying the 7 with drop hammers but to the best of myv knowledge they have not before been provided with means, other than the board, for

limiting their travel and no provision has i beenmade in connection with them for preventing a broken part or parts from'injuring those who may be about the hammer When the plate breaks. Having thus described my invention I claim .as new and desire to secure by Letters Patent Y 1. The combination with'the board clamps of a drop hammer, of a fioating -plateicarrying said clamps and ahead piece carry-fi ing said floating plate, the head piece platehaving lugs and slots and adapted to engage one another substantially as and for the purposes set forth.

2. The combination With th board clamps of a drop hammer, of a head piece thereon, a floating plate carrying said clamps and Weakest at the middle, and separate cooperating engaging means between the head piece and the two parts of the floating plate on opposite sides of the middle adapted to retain each of these parts in case of break- 3. The combination with the board clamps of a drop hammer, of a head piece thereon and a floating plate interfitting With the head piece to prevent excessive lateral movement of one with respect to the other.

4. The combination with the board clamps of a drop hammer of a head piece thereon, and a floating plate a-pertured for passage of the board and laterally supported against movement With respect to the head piece upon each side of the board to prevent said plate from flying in case of breakage.

HOWARD TER-HUN E.

Witnesses:

J. H. KUHN, W. H. FREET.

Copies 01 this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. 0. 

